const varyColor = require("webpack-theme-color-replacer/client/varyColor");
const { generate } = require("@ant-design/colors");
const { ADMIN, ANTD } = require("../../config/default");
const Config = require("../../config");

const themeMode = ADMIN.theme.mode;

// 获取 ant design 色系
function getAntdColors(color, mode) {
  let options = mode && mode == themeMode.NIGHT ? { theme: "dark" } : undefined;
  return generate(color, options);
}

// 获取功能性颜色
function getFunctionalColors(mode) {
  let options = mode && mode == themeMode.NIGHT ? { theme: "dark" } : undefined;
  let { success, warning, error } = ANTD.primary;
  const { success: s1, warning: w1, error: e1 } = Config.theme;
  success = success && s1;
  warning = success && w1;
  error = success && e1;
  const successColors = generate(success, options);
  const warningColors = generate(warning, options);
  const errorColors = generate(error, options);
  return {
    success: [...successColors.slice(0, 3), successColors[5]],
    warning: [...warningColors.slice(0, 3), warningColors[5]],
    error: [...errorColors.slice(0, 3), errorColors[5]]
  };
}

// 获取菜单色系
function getMenuColors(color, mode) {
  if (mode == themeMode.NIGHT) {
    return ANTD.primary.night.menuColors;
  } else if (color == ANTD.primary.color) {
    return ANTD.primary.dark.menuColors;
  } else {
    return [
      varyColor.darken(color, 0.93),
      varyColor.darken(color, 0.83),
      varyColor.darken(color, 0.73)
    ];
  }
}

// 获取主题模式切换色系
function getThemeToggleColors(color, mode) {
  //主色系
  const mainColors = getAntdColors(color, mode);
  const primary = mainColors[5];
  //辅助色系，因为 antd 目前没针对夜间模式设计，所以增加辅助色系以保证夜间模式的正常切换
  const subColors = getAntdColors(primary, themeMode.LIGHT);
  //菜单色系
  const menuColors = getMenuColors(color, mode);
  //内容色系（包含背景色、文字颜色等）
  const themeCfg = ANTD.theme[mode];
  let contentColors = Object.keys(themeCfg)
    .map(key => themeCfg[key])
    .map(color => (isHex(color) ? color : toNum3(color).join(",")));
  // 内容色去重
  contentColors = [...new Set(contentColors)];
  // rgb 格式的主题色
  let rgbColors = [toNum3(primary).join(",")];
  let functionalColors = getFunctionalColors(mode);
  return {
    primary,
    mainColors,
    subColors,
    menuColors,
    contentColors,
    rgbColors,
    functionalColors
  };
}

function toNum3(color) {
  if (isHex(color)) {
    return varyColor.toNum3(color);
  }
  let colorStr = "";
  if (isRgb(color)) {
    colorStr = color.slice(5, color.length);
  } else if (isRgba(color)) {
    colorStr = color.slice(6, color.lastIndexOf(","));
  }
  let rgb = colorStr.split(",");
  const r = parseInt(rgb[0]);
  const g = parseInt(rgb[1]);
  const b = parseInt(rgb[2]);
  return [r, g, b];
}

function isHex(color) {
  return color.length >= 4 && color[0] == "#";
}

function isRgb(color) {
  return color.length >= 10 && color.slice(0, 3) == "rgb";
}

function isRgba(color) {
  return color.length >= 13 && color.slice(0, 4) == "rgba";
}

module.exports = {
  isHex,
  isRgb,
  isRgba,
  toNum3,
  getAntdColors,
  getMenuColors,
  getThemeToggleColors,
  getFunctionalColors
};
